Идемпотентность

# One Idempotency-Key for the whole logical request; retried on transient codes.
key=$(uuidgen)
for attempt in 1 2 3 4 5; do
  status=$(curl -s -o body.json -D headers.txt -w '%{http_code}' \
    -X POST "$CHATTLER_BASE_URL/v1/agents/$CHATTLER_AGENT_ID/chat" \
    -H "Authorization: Bearer $CHATTLER_API_KEY" \
    -H "Idempotency-Key: $key" \
    -H "Content-Type: application/json" \
    -d '{"external_user_id": "customer-123", "message": "I want to know the price"}')
  if [ "$status" -lt 400 ]; then cat body.json; break; fi
  case "$(jq -r '.error.code' body.json)" in
    idempotency_in_progress|conversation_busy|rate_limit_exceeded|api_rate_limit_unavailable|service_unavailable)
      sleep "$(grep -i '^Retry-After:' headers.txt | tr -d '\r' | awk '{print $2}')" ;;
    *) cat body.json; break ;;
  esac
done

import time
import uuid

import httpx


def chat_with_retry(external_user_id: str, message: str, attempts: int = 5) -> dict:
    idempotency_key = str(uuid.uuid4())  # one key for the whole logical request
    for _ in range(attempts):
        response = httpx.post(
            f"{BASE_URL}/v1/agents/{AGENT_ID}/chat",
            headers={**HEADERS, "Idempotency-Key": idempotency_key},
            json={"external_user_id": external_user_id, "message": message},
            timeout=120,
        )
        if response.status_code < 400:
            return response.json()
        code = response.json()["error"]["code"]
        if code in ("idempotency_in_progress", "conversation_busy", "rate_limit_exceeded",
                    "api_rate_limit_unavailable", "service_unavailable"):
            time.sleep(float(response.headers.get("Retry-After", "2")))
            continue
        raise RuntimeError(code)
    raise TimeoutError("gave up")

const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
const RETRYABLE = new Set([
  "idempotency_in_progress",
  "conversation_busy",
  "rate_limit_exceeded",
  "api_rate_limit_unavailable",
  "service_unavailable",
]);

async function chatWithRetry(externalUserId, message, attempts = 5) {
  const idempotencyKey = crypto.randomUUID(); // one key for the whole logical request
  for (let i = 0; i < attempts; i++) {
    const response = await fetch(`${baseUrl}/v1/agents/${agentId}/chat`, {
      method: "POST",
      headers: {
        Authorization: `Bearer ${apiKey}`,
        "Idempotency-Key": idempotencyKey,
        "Content-Type": "application/json",
      },
      body: JSON.stringify({ external_user_id: externalUserId, message }),
    });
    const body = await response.json();
    if (response.ok) return body;
    if (!RETRYABLE.has(body.error.code)) throw new Error(body.error.code);
    await sleep(Number(response.headers.get("Retry-After") ?? 2) * 1000);
  }
  throw new Error("gave up");
}